i have just had the same dilema as you and i opted for the .223. my reason was as already stated the cost of ammo. i think that as a tool a .22-250 has the edge for the longer foxes which are out past 200yrds but i have had a lot of experience shooting literally 100's and 100's of foxes in the lamp and very few foxes are shot out past 200yrds with the main of them in the 120-160yrd bracket so what is the point of the extra range if you will very rarely use it and remeber many people will claim to shoot foxes up and over 3 manybe even 400 yrds but things look a lot further at night and peoples